Mineralogy Database

Fougerite Mineral Data

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General Fougerite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg)6Fe+++2(OH)18•4(H2O)
Help on Composition: Composition: Molecular Weight = 777.66 gm
   Magnesium   4.69 %  Mg    7.77 % MgO
   Iron       46.68 %  Fe   41.57 % FeO / 20.54 % Fe2O3
   Hydrogen    3.37 %  H    30.12 % H2O
   Oxygen     45.26 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+4.5Mg1.5Fe3+2(OH)18•4(H2O)
Help on Environment: Environment: Poorly drained soils ensuring reducing conditions. Meixnerite group.
Help on IMA Status: IMA Status: Proposed IMA 2003 (Dana # Added)
Help on Locality: Locality: Discovered coloring (green) the soil of the Fougļæ½res Forest in the Ille-et-Vilaine region of France Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: Green Rust
  IMA2003-057